updated README.md with instructions regarding docker

README.md

@@ -1,8 +1,29 @@
-Build and run :  
+
+*How to build and run the whole thing  
 
   $ cd compose 
 
   $ docker-compose up
 
+*How to use it
+
+Go to localhost:6660 to see what the php server serves.
+In the 
+
+  compose/docker-compose.yaml 
+
+file you can specify another port, too.
+
+Under 
+
+  overlay/opt
+
+
+you find the directory which is on the container itself.
+Build and change the project there, having the running container
+
+To list your running container issue
+
+  docker ps -a